Method of manufacturing gaskets.



J. M. TOWNE.

METHOD or mmumowunme GASKETS APPLICATION FILED JULY 22, 1909.

966,873. Patented A ug.9,1910.

. 514110141101: Jmfqaizfl Town 6 I 5513 Gwen lag UNITED STATES PATENT OFFICE. JosEPE: m. rowNEoE EAST oEANGE, NEW EIERSEY, assienoni'o sAEE'rY can HEAT;

I me a LIGHTING FOMPANY, A conro m'rron on. NEW EnsEY;

r V application inea m 22, 1909. Serial not 508,9 15.

' Specification of Letters Patent.

T METHOD or ANUFACTURING 'cAs 'rs,

"Patented Aug. 9, 1910.

To all who in itmay concewt: i

\ Be it known that I, J osnrir M. Townnfa citizen of the United States, residing in East Orange, county of Essex, and State of 5 New Jersey, have invented new and useful Improvementsin Methods of Manufacturing Gaskets, of which the following is a de- SCIl tion. V

y invention pertains to the manufacture of that class of gaskets adapted to be repeatedly used in making! up temporary "steam tight joints and has for ts particular object to rovide a method of making gaskets whic will withstand high internal pressure and repeated application of heavy pressure against the face without crumbling,

attening, 'or being injured by abrasion.

A further object is to provide a method of making gaskets possessing the above quali; fications which shall also possess considerable resiliency and at the same time expand slightly under the action of heat so as to be very applicable for usein making temporary steam tight joints. a, F

'As gaskets made in accordance with my method are particularly applicable for use in straight-port steam couplers, the method will be explained in connection with the manufacture of a gasket intended for this use while it .will, of course, be obvious that the same method may be pursued in making gaskets for any purpose whatever without departing from the scope of my invention.

In the drawing Figure I showsa cross section of one form of material outof which my gasket may be made. Fig. II shows a slight modification of the material as used in makin up my "gasket. Fig. III is :a cross section 0 the gasket partly finished in accordancefwith my method.- Fig. IV is a cross section of the mold and one of my gaskets rat a certain point in. my process which will hereinafter be described. Fig. V shows across section of afinished gasket made in accprdance with my method.

My im roved method of manufacturing" gaskets o 6ne form as employed by-me is substantially as follows Ribbons of suitable length are made up cut of strips of fibrous material and vulcantreble elastic material such as, rubber 'e or some of its compounds as shown in section in Fig. I, in which 1 represents a section of the fibrous material which; for example, he may be asbestos paper and 2 the yieldingtill hill

. manufacture of my gaskets'Ifind that a very "good gasket is produced if asbestos paper g of the gasketwill be creed into the shape.

vulcanizable material which, for example, may" be usudurian packing. These materials are cemented together as, for example, by rubber cement and if desired the fibrous material 1 may be provided with small per- 0 forations therein, as indicated by 18, for the purpose which will hereinafter be'described;

A slightly modified form of ribbon is shown in Fig. II in which the vulcanizable elastic aterial 2 is shown as having applied '65 to each side thereof a layer of the fibrous material .In making these ribbons for use in the inch in thickness be cemented to usudurian packing of about 'the same thickness.

To make the particular form of gasket shown in section in Fig. III, I first out one 7 x of the ribbons shown in Figs. I and IIi lengthwise so as to form a ribbon one-half the usual width'and cover the same on one side with cement. I then take the metallic thimble-3, having the central aperture 4 and spun flange 5, and wind upon the same a portion' of'the narrow ribbon as shown clearly in Fig. III; that is, the narrow ribbon is Wound to produce a slightly greater diameter than the outside diameter of the flange 5. I then take a ribbon of the regular Width as shown in Figs. I and II, cement the same on one side and wind this upon the narrow layers previously applied as clearly shown in section in Fig. III until a suitable outside diameter is produced. I then slip the thimble and gasket over the mandrel 6 of the mold 7 which is provided with a recess 8 to, I receive the flange of thethimble, and press the gasket back until the same 'fills thecavity 9 of the said mold. Then the member, 10, provided with the knife-edged, tapering portion 11, is passed over the end of the mandrel 6 and the outer edge of the asket is inserted 'into the conical bore thereof. Then suflicient pressure is applied as bymeans of a hydrauhe press or other suitable mechanism to force the member .10 into the position indicated in the drawing when the left-hand portion of the gasketwill take sha e of the mold in,- dicated at 13 and the ri htand face portion v indicated at 12by the conical surface ofthe member 10 which, owing to its conical shape, ./will cause the yielding material to be firmly forced around the flange 5 and subjected at U mold and gasket are allowed to cool and the gasket then withdrawn from the mold, at which time a section of .the gasket is substantially as shown in position in the mold in Fig. IV. The gasket is then placed in alathe and turned down to such diameter as will tightly fit the metallic armor or retaining ring indicated at 15, a suitable shoulder or flange 19 being left as indicated. The ring 15 is then forced into place and the face of the gasket trued up as indicated at 17 and chamfered, or rounded, on the edge as indicated at' 16. Itwill be noticed that this method produces a laminated gasket, the

laminae of which are alternately resilient vulmaterial and the action of the pressure of the I mold and vulcanizing of the material while under that pressure tends to form the entire mass of yielding material into a permanent structure combining the wearing quality of the fibrous material with the elastic quality of the vulcanizable material. If the fibrous ribbons be provided with holes as indicated at 18 the vulcanizable material will beforced through the same so as to unite on each side thereof.

I do not wish in any way to limit myself to the exact procedure outlined above nor in any way to the apparatus which I have described as useful in the performance of my method of manufacturing gaskets as it is obvious that wide departure may be made without departing from the scope of my invention which is as set forth in the following claims.

I claim 1. The method of manufacturing gaskets which consists inwinding continuous layers of fibrous and vulcanizable materials upon each other to form an annular mass, then subjecting the same to pressure and vulcanizing the same under pressure.

2. The process of manufacturing gaskets which consists of forming an annular structure ofalternate and substantially' concentric continuous layers of hard fibrous material and softer vulcanizable material, then subjecting the mass to pressure and to high temperature under pressure. I

3. The method ofmanufacturing gaskets adapted to be subjected to high pressure between surfaces which consists in windin alternate layers of hard fibrous material and more elastic vulcanizable material into a form approximating that of the finished gasket, then subjecting the same to pressure in the direction to be resisted by the finished gasket and vulcanizing the same while under pressure.

4:. The process of making gaskets whichv consists in winding alternate layers of hard fibrous material and more elastic vulcanizable material about a central axis, subjecting the same to radial and longitudinal preswhich consists in forming continuous ribbons made up of alternate layers of fibrous and vulcanizable materials, winding said ribbons about a central axis, subjectin the material so wound to pressure and vu canizing temperature and then cooling the same.

7. The process of manufacturing askets which consists in cementing toget er to form a ribbon layers of asbestos paper and a rubber compound, applying cement thereto, winding said ribbons about a central axis to give the gasket a radial depth, subjecting the mass so wound to pressure and raising the temperature to that sufficient to vulcanize the rubber compound.

8. The process of manufacturing gaskets which consists in cementing together asbestos paper provided with perforations and a rubber compound to form a ribbon, winding said ribbon about a central axis 'to produce a structure of suflicient radial depth, subjecting the same to high pressure to force the mass into approximately the shape of the finished gasket and subjecting the same to high temperature for the purpose of vulcanizing the vulcanizable portion thereof.

9. The process of manufacturing askets which consists in forming ribbons o alternate layers of fibrous and elastic materials, winding the same upon a metallic sleeve, subjecting the same to pressure against the sleeve and vulcanizing under pressure.

10. The process of manufacturing gaskets which consists in windin la ers of fibrous and vulcanizable materia s a out a central axis, compressing the same, subjecting to high temperature for vulcanizing and then turning into the shape desired.

11. The method of manufacturing gaskets which consists in cementin together layers of fibrous and elastic materlals, winding the same about a centralaxis, compressing the mass so Wound, subjecti.1 the same to vulcanizing. temperature an then machining the same into the desired form.

12. The method of manufacturing gaskets which consists in buildin up a'structure of alternate laminae of elastic vulcanizable material and fibrous material, compressing the same into a desired conformation and subjecting the same-so compressed to the action of Yulcanizing temperature.

13. The method of manufacturinggaskets which consist in winding layers of a rubber compound and a fibrous material upon a sleeve provided with an expanded portion, subjecting said Winding to radial and longitudinal pressure in such manner as to inclose the said expanded portion of the sleeve, then vulcanizing the rubber compound.

14. The method of manufacturing gaskets which consists in Winding laminae of hard fibrous material and softer rubber material. 7 about a central axis, subjecting the said materials to suflicient pressure within a mold to take the desired form thereof, then vulstructure of fibrous and vulcanizable materlals and forcing a retammg rmg thereon.

JOSEPH M. ToWNE.

Witnesses:

JOHN T. CLARK,

E. HALL.

then removing the same from said 

